The E-PROPS PROPELLERS Company
ZI aerodrome Sisteron
04200 VAUMEILH - France
Phone : +33 4 92 34 00 00
Phone reception opened from Monday to Friday
From 9 to 12 a.m and 2 to 4 p.m.
The best way to reach us is by email : helices@e-props.fr

E-PROPS : Data Sheet

✗ HI-TECH Propellers for AIRCRAFT
✗ The world's lightest propellers
✗ Very strong : 100% carbon, very high fibers ratio, RTM Manufacturing, leading edge protection
✗ Many models for Rotax serie 9, tractor and pusher
✗ Made in France since 2008
✗ E-PROPS production : 30.000 blades / year
✗ Propellers sold in more than 80 countries

2- E-PROPS range for AIRCRAFT

E-PROPS has developed many models for ROTAX serie 9 engines, tractor (DURANDAL range) and pusher (EXCALIBUR range).
Thousands of those propellers equip more than 350 different models of ultralights and aircraft, all over the world.
E-PROPS has not one “universal” blade, that can be cutted as necessary, and which are never very well adapted.
Every E-PROPS propeller is designed and tested for a specific engine, its reducer if any, the diameter, the speed range of the aircraft, the special configuration...
All E-PROPS blades have different chords, diameters and profiles, and are produced by specific molds.
E-PROPS proposes more than 185 blades geometries, and as result, exceptional performances for each set of aircraft / engine / propeller.
The DURANDAL and EXCALIBUR ranges have been designed for engines with reducers.
It is strictly forbidden to use them on a direct drive engine.

4- Blades

The E-PROPS are fully made in carbon.
Optimum use of carbon fibers braid and epoxy resin to obtain ultra-light and very strong blades.
HCF system (Helical Continuous Fibers : Fibres Continues Hélicoïdales), specifically designed by E-PROPS.
Very high fibers ratio : 63%
See the page E-PROPS MANUFACTURING

5- Blade's feet

6- Hubs

Hubs made in full carbon + epoxy resin
Ground adjustable pitch system
Compact hub for minimum drag and to optimize engine's cooling
Innovative system to replace the usual spacers in aluminium : EXTENED HUBS

7- Spinners

8- Finish

Finish with shiny polish.
The carbon braid remains visible; each blade is unique.
No paint, varnish or gel-coat, because those products are very polluting.
The E-PROPS company is committed in an eco-management approach and proscribes this type of products.
In addition, paints, varnish and gel-coat do not allow to easily repair the blades in case of impact.

9- Leading Edge Protection

All E-PROPS have an internal shielding in the blades : injection at the leading edge of a special resin with Nanostrength® additive shock.
In special cases (as seaplanes), it is strongly recommended to an extra protection on the blades leading edge, in order to reinforce it,
with a polyurethane protection tape used on certified helicopter rotor blades.
See here : LEADING EDGE PROTECTION

10- Moment of Inertia

The E-PROPS, ultra-lightn, strictly respect the MOI limitations given the engines manufacturers.
Moment of inertia of each model calculated then verified on the tests bench.
See details here : MOMENT OF INERTIA

12- Quality / Certification / Life Limitation

The E-Props propellers are designed, manufactured and tested to meet the requirements of the aeronautical standards.
They are ASTM F2506-13 certified (lSA standards).
No life limitation. MTBO recommended at 2.000 hours.
Quality and safety are ongoing concerns for the E-PROPS company, throughout the design, procurement, manufacturing, testing and marketing of all its products.
More information on page QUALITY

13- Repairs / Spare Blade

Small impacts can be easily repaired (epoxy resin without paint, varnish or gel-coat).
A repair kit is available in this e-shop.
See details here REPAIRS
By E-PROPS, it is possible to change only one blade.
See explanations on the page : SPARE BLADES

14- Mechanical Strength / Tests

E-PROPS is doing many tests on all the propellers models.
Example, centrifugal load : break at 11.000 tonnes, safety coefficient : 7,2
Carbon propeller can hold 6 times the maximal load during 1 hour without any damages.
See here TESTS ON GROUND

16- Max RPM

17- Maintenance

Maintenance is simple :
- Before each flight: visual inspection of the propeller (particularly check the leading edge) and check the screws tightening.
- Every 100 hours of flight and/or every 6 months : check of the screws tightening.
- EXCALIBUR-6 model => every 25 hours of flight and/or every 3 months : check of the screws tightening.
Cleaning of a carbon propeller is made with a sponge, with some water with soap, or with a product for windows cleaning.